1. Once open a file into the variable "filetxt" generate a function to search the identifier: "Resultados de la optimizacion". 2. Now read information spread by tabs in the next 48 lines only

filetxt = open('/home/david/Documents/python/logs_sas_v2/log_sas_opt_2/opt_2.txt','r')
#search_text = 'Resultados de la optimizacion'

def search_text(filetxt):
    for line in filetxt:
        if 'Resultados de la optimizacion' in line:
            return True
    return False
        
filetxt.seek(0, 0)
search_text(filetxt)

def read_txt(filetxt, search_text):
    if search_text:
        print('Search_text: ', search_text)
        for i in range(0, 48):
            print(filetxt.readline(), end=' ')

filetxt.seek(0, 0)
read_txt(filetxt, search_text(filetxt))